混凝土楔入劈拉破坏的损伤塑性模拟

Numerical simulation on concrete damage plasticity under wedge split

针对混凝土在微观上产生的损伤或者断裂,长期积累下来会导致在宏观上破坏的问题,基于试件表面的数字图像,建立反映真实骨料形状和分布的二维有限元模型,并通过混凝土损伤塑性模型进行楔入劈拉试验中混凝土非线性破坏的数值模拟.模拟结果与试验结果非常吻合,很好地反映混凝土试件的破坏区域和损伤发展的路径.

As to the issue that the macro damage of concrete may occur due to the long-term microdamage or fracture,a 2D finite element model is built on the basis of the digital image of a specimen surface,which can reflect the real aggregate shape and distribution,and the nonlinear damage of concrete under wedge split test is numerically simulated on the basis of damage plasticity model. The simulation result is consistent with the test result,which shows the damage area and progress of the concrete specimen well.